Case study

OpenGromada: reconstructing the Sigma Games engine

OpenGromada reconstructs the engine used by Sigma Games titles including AS1/ZS1, Theseus, Crazy Lunch and Locoland/Steamland. Its C++20 executable reads the user's game resources and supports multiple platforms and architectures, widescreen display and gamepads.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-08
Evidence class: C2 code & docs, no demo or download

Stars: 12
Last commit: 2026-10-07
Language: C++

GitHub data as of 2026-11-10

Copy as Markdown View JSON Cite

Evidence

Observed: Code, documentation and a download method observed; no demo found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: The relevant game's objects.res and data directories are required.
Prerequisites: Building requires CMake or Premake, a C++20 compiler and SDL3; Steamworks SDK and FFmpeg 6+ are needed for the named optional features.
License: Sustainable Use License 1.0.

Cite

BibTeX

@misc{opengromada-case,
  title = {{OpenGromada: reconstructing the Sigma Games engine}},
  howpublished = {\url{https://github.com/siohaza/OpenGromada}},
  url = {https://github.com/siohaza/OpenGromada},
  urldate = {2026-11-08},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/opengromada-case/}}
}

Plain text

OpenGromada: reconstructing the Sigma Games engine. https://github.com/siohaza/OpenGromada (accessed 2026-11-08). Awesome REA entry: https://awesomerea.org/resources/opengromada-case/

Useful? Star Awesome REA on GitHub2.4k

About this entry

The description was reviewed against primary sources.

Report an outdated entry Suggest a translation fix

Primary sources

README.md GitHub · siohaza/OpenGromada · Revision 9b1e839